import java.net.*; 
public class Example13_2 {
	public static void main(String args[]) {
		try{  InetAddress address_1=InetAddress.getByName("www.sina.com.cn");
			System.out.println(address_1.toString()); 
			InetAddress address_2=InetAddress.getByName("166.111.222.3");
			System.out.println(address_2.toString());
		}
		catch(UnknownHostException e) {
			System.out.println("无法找到 www.sina.com.cn");
		} 
	}
}
